STMicroelectronics STM32L152VCH6D

Overview

STM32L152VCH6D from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 256 KB Flash, 32 KB SRAM, 8 KB EEPROM with ECC, integrated LCD controller (up to 8×40 segments), and USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 1.25 DMIPS/MHz performance. It targets battery-powered industrial sensors and portable medical devices requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152VCH6D datasheet, STM32L152VCH6D pinout, STM32L152VCH6D application, or STM32L152VCH6D equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC with 25 channels and 1 Msps, dual 12-bit DACs, ultra-low-power comparators with wake-up capability, and LQFP100 package compatibility for high-pin-count sensor fusion designs.

Technical Context

The STM32L152VCH6D implements dynamic voltage scaling and multiple low-power modes-Stop (0.44 µA), Standby (0.29 µA), and Low-power Run (8.6 µA)-with sub-8 µs wake-up latency. Its clock system integrates a 32 kHz RTC oscillator with calibration, 16 MHz HSI RC (±1%), and a 48 MHz PLL dedicated to USB timing.

Analog subsystem includes two operational amplifiers, two ultra-low-power comparators (window mode + wake-up), a 12-bit ADC (25 channels, 1 Msps), and two buffered 12-bit DACs. Memory architecture features ECC-protected Flash and true EEPROM, enabling robust data logging in field-deployed equipment.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; 83 I/Os (70 tolerant to 5 V), all mappable to 16 external interrupt vectors.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.

Compared with STM32L152VCH6D, the RCT6 offers footprint reduction at the cost of I/O and display capability, while the L432KCU6 trades EEPROM and wide-temp operation for FPU and cryptography-making each optimal for distinct subsystem priorities.

Availability

STM32L152VCH6D is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart utility meters, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L152VCH6D includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding multi-year battery life, robust memory integrity, and integrated analog peripherals - optimized for industrial, healthcare, and metering markets where reliability and energy efficiency are non-negotiable.

FAQ

Does STM32L152VCH6D support USB device mode without external crystal?

Yes. The part integrates a 48 MHz PLL fed by its internal 16 MHz HSI RC oscillator (±1% factory-trimmed), enabling full-speed USB 2.0 device operation without an external crystal. This reduces BOM cost and PCB area while maintaining USB compliance per Section 3.17.5 of the datasheet.

What is the maximum operating frequency when running from 1.8 V supply?

At 1.8 V, the maximum CPU frequency is 16 MHz, enforced by dynamic voltage scaling (DVS) logic. This is confirmed in Table 4 ("CPU frequency range depending on dynamic voltage scaling") and Section 6.3.1, ensuring safe operation within silicon limits while maintaining 1.25 DMIPS/MHz performance.

Can the 8 KB EEPROM be used for storing cryptographic keys?

Yes. The 8 KB true EEPROM includes ECC protection and supports 400 kcycle endurance with 20-year data retention at 85 °C (Table 37). Its byte-write capability and hardware write-protection registers make it suitable for secure key storage - though external secure element is recommended for PKI root keys per ST's AN4821 guidance.

How many capacitive sensing channels can operate simultaneously during low-power run mode?

All 23 capacitive sensing channels remain functional in Low-power Run mode (8.6 µA), as confirmed in Table 5 ("Functionalities depending on the working mode") and Section 3.15. The CSD peripheral retains full resolution and scan speed, enabling responsive touch UIs while preserving battery life in handheld instruments.